National Museum of Costsa Rica
Siatued at Fort Good View and next to the Plaza de la Democracia. Formerly a military headquarters, so in a wing of the fortress they preserve the stances of the fort and explain with pictures how it used to be, and you can visit the dungeons, the booths and toilets. The museum traces the history of Costa Rica and its people. I recommend it. The price in 2007 was 4 dollars. Inside is a part of natural history and you can see a butterfly garden next to the craft market.